xref: /llvm-project/libcxx/test/std/utilities/template.bitset/bitset.members/any.pass.cpp (revision f02120fba28f2352fd9396683892fc6671caa137)
1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // bool any() const; // constexpr since C++23
10 
11 #include <bitset>
12 #include <cassert>
13 #include <cstddef>
14 
15 #include "test_macros.h"
16 
17 template <std::size_t N>
test_any()18 TEST_CONSTEXPR_CXX23 void test_any() {
19     std::bitset<N> v;
20     v.reset();
21     assert(v.any() == false);
22     v.set();
23     assert(v.any() == (N != 0));
24     if (v.size() > 1) {
25         v[N/2] = false;
26         assert(v.any() == true);
27         v.reset();
28         v[N/2] = true;
29         assert(v.any() == true);
30     }
31 }
32 
test()33 TEST_CONSTEXPR_CXX23 bool test() {
34   test_any<0>();
35   test_any<1>();
36   test_any<31>();
37   test_any<32>();
38   test_any<33>();
39   test_any<63>();
40   test_any<64>();
41   test_any<65>();
42   test_any<1000>();
43 
44   return true;
45 }
46 
main(int,char **)47 int main(int, char**) {
48   test();
49 #if TEST_STD_VER > 20
50   static_assert(test());
51 #endif
52 
53   return 0;
54 }
55